Wire strand or rope.



E. H. PARKER.

WIRE STRAND 0R ROPE.

APPLICATION FILED APR. I6, 1915.

1,183,487, Patented May 16,1916.

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EDWARD i-L-PARKER, F woncssrn'n, MASSACHUSETTS, ASSIGNOR or oNnHALr TO I THOMAS GORE, or. BROOKLYN, NEW YORK.

WIBE STRAND OR ROPE.

Specification of Letters Patent.

Patented May 16, 191

Application filed April 16, 1915. Serial No. 21,667.

ToaZZ whom it may concern:

Be it known that I, EDWARD H. PARKER, a citizen of the United States, and a resident oflVor'cester, in the county of Worcester and Stateot' Massachusetts, have invented certain new and useful Improvements in lVire Strands or Ropes, of which the tollowing is a specification.

a The present invention relates to wire st "ands or cables and has for its main object the prolonging of the lite oi the strand or rope by eliminating the sharp points of contact between the wires and lncreasing the surface contact therebetween.

Accordingly the invention comprises a strand composed of a. center wire having previously formed helical grooves in the body portion thereof and a plurahty of outer wires disposed around said center wire and laid helically in the grooves of the center wire.

The nvention further conslsts in a rope orcable made up of a plurality of such strands laid around a suitable core of any character. 4

In the accompanying drawings the 1nventionj'i disclosed in a concrete and preferred forinbut changes of construction may be made without departing from'the legitimate and intended scope of the invention.

. jQf-Iii the said drawings: Figure l is. a transverse sectional view through the center wire of a strand. F 1g. 2 1s a view 111 elevation of the .said center wire. ,Fig. 3- is a crosssectional vlew of a strand embodying the invention. Fig.4 is a cross'sectional view of a rope or cable embodying the invention. Similar characters of reference indicate corresponding parts in the different views.

"1 indicates a round centerwire provided with previously formed helical grooves 2 in the body portion thereof around which are laid a plurality'of wires 3, said Wires being round-and being laid helically in the grooves 2 of the centeiiwire'.

By vstudymgth'e construction shown in 3 the nature of my invention and its ad vantage over known 'forms' of strand w1ll be readily understood.

Heretofore in the construction of wirestrands the center or forming wire of each strand is round and without any grooves so that the. outer wires will make contact with the center Wire and with each other at one point only. Or else the center member is made up of a plurality of specially shaped wires, generally of a fiat-like character. In the construction shown in Fig. 3 the helical grooves of the center wire form a bed in which the outside wires are locked by being laid therein and instead of chafing the cen ter wire at one point the wear is distributed over a relatively large area. It will also be observed that since round wires 3 are employed it is possible to lay them by means of bobbins having a planetary motion so that no torsion is imparted to the wires in laying them, and consequently there is no tendency for the wires to untwist.

Such a strand. as is shown in Fig. 3 may consist of any number of wires found suitable and a number of such strands may be laid up into a rope or cable havlng any desired number of strands and having any suitablescore. One of said strands may form the core of such a rope or cable but in the forni here disclosed there is shown a fiber core 4 with a plurality of-strands 5 of the character described laid therearound'.

What is claimed is:

1. A strand composed of a 'center' wire having previously formed helical grooves in the body thereof. and a plurality of outer wires disposed around said center wire and laid helicall vin the grooves of the center wire.

2. A strand composed of a round center wire having previously formed helical grooves in the body thereof, and a plurality wire having previously formed helical grooves in the body'thereof, and a plurality of round wires disposed around said center wire and laid helically in the grooves of the center wire. I I

5; A stranded rope comprising: a core, and a plurality of strands laid around said core, each strand consisting of a center wire" having previously formed helical grooves in the body thereof and a plurality of outer wires disposed around said center wire and laid helically in the grooves of the center 7. A stranded rope comprising: a core,

and a plurality of strands laid around said core, each strand consisting of a center Wire having previously formed helical grooves in the body thereof and a plurality of round Wires disposed around said center Wire and laid helically in the grooves of' the center 'i wire.

8. A stranded rope comprising: a core, and a plurality of strands laid around said core, each strand consisting of a round center wire having previously formed helical grooves in the body thereof and a plurality of round wires disposed around said center wire and, laid helically in the grooves of the center wire.

Signed at lVorcester, in the county of orcester'and State of Massachusetts, this Oopien of this patent me! he obtained for five cents each, hy addressing the Commissioner of Patents,

Washington, D. 0. y 

